Formerly known as CDS (1982-92) and presently known as Idigicon Ltd. (since 2002).

Notably, Guildhall supported the Amiga games market in the mid-to-late 1990s as an independent publisher - following Commodore's bankruptcy - by releasing games from several new talented developers, including Acid Software, Black Magic and Binary Emotions. Additionally, they re-released several classic Amiga games and educational titles under licence from many legacy publishers including Microprose, Electronic Arts, 10 Out Of 10 Educational and Audiogenic, as well as their own CDS back-catalogue .